RRDRESIZE(1)                         rrdtool                        RRDRESIZE(1)

NAME
     rrdresize - alters the size of an RRA and creates a new .rrd file

SYNOPSIS
     rrdtool resize filename rra-num  GROW|SHRINK rows

DESCRIPTION
     The resize function is used to modify the number of rows in an RRA.

     filenamethe name of the RRD you want to alter.

     rra-num the  RRA  you  want to alter. You can find the number using rrdtool
             info.

     GROW    used if you want to add extra rows to an RRA. The extra  rows  will
             be inserted as the rows that are oldest.

     SHRINK  used  if you want to remove rows from an RRA. The rows that will be
             removed are the oldest rows.

     rows    the number of rows you want to add or remove.

NOTES
     The new .rrd file, with the modified RRAs,  is  written  to  the  file  re‐
     size.rrd in the current directory.  The original .rrd file is not modified.

     It is possible to abuse this tool and get strange results by first removing
     some  rows  and then reinserting the same amount (effectively clearing them
     to be Unknown). You may thus end up with unknown data in one RRA  while  at
     the same timestamp this data is available in another RRA.

AUTHOR
     Alex van den Bogaerdt <alex@vandenbogaerdt.nl>

1.11.0                             2026-08-08                       RRDRESIZE(1)
